Grout cleaning brush



FIG. 1 is a top perspective view of a grout cleaning brush showing my new design, shown in a position of use with the broken lines showing a handle and a user's hand being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a bottom perspective view of the design claimed in FIG. 1 with the coupling member shown in a vertical orientation;

FIG. 3 is a top plan view of FIG. 2;

FIG. 4 is an inverted side elevation view of FIG. 2;

FIG. 5 is a bottom plan view of FIG. 2; and,

FIG. 6 is an inverted end elevation view of FIG. 2. 

I claim the ornamental design for a grout cleaning brush, as shown and described. 